(b). Choices (a) and (c) are incorrect because the unaligned sine curves of this circuit mean the voltages are out of phase, and so we cannot simply add the maximum (or rms) voltages across the elements. (In other words, ΔV ≠ ΔVR+ ΔVL+ ΔVCeven though Δv = ΔvR+ ΔvL+ ΔvC .)